A Sample of N = 20 Scores Has a Mean

question 25

Multiple Choice

A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 8.In this sample,what is the z-score corresponding to X = 57?​

• A)​z = 12/20 = 0.60
• B)​z = 1.00
• C)​z = 1.50
• D)​z = 2.00

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